[1.2.X] Fixed #13951 -- Corrected docstring in formtools wizard. Thanks to...

[1.2.X] Fixed #13951 -- Corrected docstring in formtools wizard. Thanks to suzaku for the report, and lrekucki for the patch.

Backport of r13630 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13631 bcc190cf-cafb-0310-a4f2-bffc1f526a37